Automatically-threading loom shuttle



May 6, 1930. C. DRAPER 1 AUTOMATICALLY THREADING LOOM (SHUTTLE Filed May 10, 1929 ama 4M A TORNEY Patented May 6, 1930 UNITED STATES PATENT OFFlCE CLARE H. DRAPER, OF HOPEDALE, MASSACHUSETTS, -ASSIGNOR T DRAPER CORPORA- TION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE AUTOMATICALLY-THREAIDING LOOM SHUTTLE Application filed May 10,

This invention relates to automatically threading loom shuttles and is more particulary directed to a novel thread tensioning means, whereby uniform tension is maintained upon the thread during weaving.

In looms of the automatic replenishing type, a new supply of filling is furnished when that previously in use has reached a predetermined degree of exhaustion. In one type of such replenishing loom the depleted filling carrier or bobbin in the shuttle is replaced by one carrying a working supply of filling during the replenishing operation, and in such type of replenishing loom the end of thread extending from :the fresh filling .car-

rier is secured at a fixed point, generally on a part of the hopper from which the fresh supply of filling is taken by the replenishing mechanism.

' On the first pick of the shuttle following replenishment it is desirable that the filling thread be subjected to tension which will remain substantially the same throughout the subsequent weaving operation, and many at- 7925 tempts have been made to solve the problem thus presented.

One of the objects of the present invention is'to provide a simple but effective means for subjecting the filling thread to substantially the same tension on the first pick of the shuttle following replenishment as exists during subsequent weaving when the shuttle becomes fully threaded.

Theinvention and novel features thereof will best be made clear from the following description and theaccompanying drawings of one good practical form thereof.

In the drawings:

Fig. 1 is a perspective view of an automatically threading shuttle provided with the present invention;

Fig. 2 is a section on the line 2-2 of Flg. 1, some of the parts being broken away;

Fig. 3 is a sectionon the line 38 of Fig. 2;

Fig. 4 is a detached perspective view ofa threading block containing the present invention; and 0 Fig. 5 is a detached and enlarged detail showing the scroll and the thread deflector in their associated relations.

1929. Serial No. 381,901.

In the drawings, the shuttle 1 may be of the usual filling replenishing type, and is provided with'the bobbin chamber 2 in which is detachably supported the filling carrier or bobbin 3 on, which the filling 4 is wound. The bobbin holding jaws for detachably holding the filling carrier or bobbin in the shuttle are not herein shown because their details form no part of the present invention.

In accordance with the present invention the automatically threading shuttle has a longitudinal thread passage and side delivery eye, both of which may be variously contrived, but as shown in the present instance of the invention the shuttle is provided'wi'th a threading block 5 between the walls 6 and 7 of which is the thread passage 8 which extends longitudinally of the threading block and communicates with the side delivery eye 9 which is laterally disposed with respect to the longitudinal thread passage. V

The threading block 5 has the thread director 10 and the th ead guiding surface 11 WillGlllQEtClS'lJO the side delivery eye 9, whereby the shuttle may become fully threaded on the second pick following replenishment.

Frontward of the longitudinal thread passage 8 the wood of the shuttle is formed with an inclined thread leader 12 which is arranged inclined to the longitudinal axis of the shuttle in substantially the direction of the filling thread extending from the fixed pointof the hopper to the shuttle when the lay isin its substantially rearward position and the shuttle is ready to be picked. This inclination of the thread leader 12 insures preliminarythreading-of the shuttle on the first pick following replenishment, and in a measure also insures complete threading of the shuttle as the shuttle is picked from the non-replenishing box.

The threading block 5 is secured in the shuttle inusual manner by the bolt 13 which may be of usual construction.

The longitudinal thread passage formed in the threading block 5 terminates at each end in a bridge and, as shown in the present instance of the invention, a scroll is mounted in the longitudinal thread passage between the front and rear bridges.

The front bridge 14 directs the thread to the side delivery eye as the thread a is turned laterally under the guide 15, Fig. 2. The rear bridge 16 receives the filling thread a directly from the filling carrier or bobbin 3 in the shuttle as the thread is withdrawn, and between the front and rear bridges 14 and 16 is the scroll 17 which is located in the longitudinal thread passage of the threading block.

The scroll 17 is secured in the thread passage at a point adjacent the entrance thereto and has a foot portion 18 underlying the threading block 5 and a side portion 19 extending upwardly and laterally and downwardly relative to the longitudinal thread passage, as indicated at 20 in Figs. 1 and 2. The scroll 17 has its front end portion 21 reaching forward in the thread passage towards the front bridge 14.

As hereinbefore mentioned, it is desirable that the thread be subjected to proper tension on the first pick of the shuttle following replenishment and that such tension be substantially maintained throughout the weavin g operation. In accordance with the present invention, therefore, the filling thread a. as it is withdrawn from the shuttle, is caused to take a tortuous course between the front and rear bridges as it passes through the scroll, and as a means to this end the scroll itself is provided with a thread deflector which extends transversely across the interior of the scroll to deflect the thread be tween the entrance and exit portions of the scroll and thread passage.

In the present instance of the invention, the thread deflector is constituted by a plate which extends transversely across the interior of the scroll. The thread deflector may be variously contrived, but, as shown in the present instance of the invention, when it is formed as a plate, the upper portions of the thread deflector or plate may be secured to the interior of the scroll 17 as indicated at 23, and as the scroll extends spirally lengthwise of the thread passage, the lower edge portion 24 of the thread director or plate 22 will be exposed below the longitudinal axis of the scroll and between the front and rear bridges, with the result that the lower edge portion 24 of the thread deflector will cause the thread to be bent under the edge 24 as it passes through the scroll.

It may be desirable at times to depress the surface of the thread passage 8 between the bridges 14 and 16, as indicated at 25, so that the lower edge 24 of the thread deflector under which the thread passes may depress the thread to a substantial amount between the front and rear bridges, as indicated in Fig. 2, thereby imparting the desired tension.

On the first pick of the shuttle following replenishment the scroll 17 will guide the swirling thread in the thread passage under the lower edge 24 of the thread deflector, and then over the terminal end portion of the scroll near the bridge 14, and the thread will maintain this position and consequent substantially uniform tension on subsequent picks of the shuttle.

Where the front and rear bridges are higher than the lower edge of the thread deflector, as indicated in Fig. 2, the thread will take a well-defined tortuous course in a substantially vertical plane as it passes through the scroll and longitudinally of the thread passage on the first pick following replenishment.

What is claimed is:

1. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a scroll in the longitudinal thread passage through which the thread passes on its way to the side delivery eye, and a thread deflector extending transversely of and within the scroll to engage and deflect the thread between the entrance and exit ends of the scroll.

2. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a scroll through whicn the thread passes on its way to the side delivery eye, and a thread deflector which crosses the thread passage within the scroll to deflect the thread between the ends of the scroll.

3. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a scroll through which the thread passes 011 its way to the side delivery eye, and a thread deflector secured to the scroll between its ends and extending transversely across the interior of the scroll to deflect the thread as it passes longitudinally through the scroll.

4. An automatically threading loom shuttle having a side delivery eye, a longitudinal thread passage having its lower wall provided with an upwardly projecting front bridge and an upwardly projecting rear bridge both of which extend upwardly above the lower wall of the thread passage and upon which the thread rests on its way to the side delivery eye, and a thread deflector in the thread passage between the two bridges having its lower thread engaging edge below the straight line connecting the tops of the two bridges on which the thread rests that the thread may be deflected downwardly between the two bridges.

5. An automatically threading loom shuttle having a side delivery eye, a longitudinal thread passage havingitslowerwallprovided with a front bridge and a rear bridge both of which extend upwardly above the lower wall of the thread passage and upon which the thread rests on its Way to the side delivery eye, and a thread deflector in the thread passage between the two bridges constituted as a plate obstructing the longitudinal axis of the thread passage and having its lower thread engaging edge below the straight line connecting the tops of the two bridges on which the thread rests that the thread may be deflected downwardly between the two bridges.

6. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a scroll in the longitudinal thread passage through which the thread passes on its way to the side delivery eye, and a thread deflector constituted as a plate extending transversely across the interior of the scroll to deflect the thread as it is drawn longitudinally through the scroll.

7. An automatically threading loom shuttle having a threading block provided with a longitudinal thread passage, a bridge at the front and rear of the thread passage,

a scroll in the thread passage, and a thread deflector extending across the interior of the scroll and having an edge portion under which the thread is deflected between the bridges as it passes through the scroll.

8. An automatically threading loom shuttle having a threading block provided with a longitudinal thread passage, a bridge at the front and rear of the thread passage, a scroll in the thread passage, and a thread deflector constituted as a plate extending across the interior of the scroll and having an edge portion under Which the thread is deflected between the bridges as it passes through the scroll.

In testimony whereof, I have signed my name to this specification.

CLARE H. DRAPER. 

